Improvement in sewing-machines



A., H. HOOK. Sewing Machine. N0 21-;049.-

' Patented July 27, 1858.

N PETERS. Photo-Ulhcgnpher. Washingicn. D. c.

' functions are old and well known.

NITE STATES ATEN A. H. HOOK, OF NEWV YORK, N. Y., ASSIGNOR TO UNIONSEWING MACHINE COMPANY, OF SAME PLACE.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 2 L049, dated July 27,1858.

To aZZ whom it may concern:

Be it known that I, ALBERT H. HooK, of

the city, county, and State of New York, have invented certain -new anduseful Improvements in Single-Threaded Sewing-Machines; and I do herebydeclare and ascertain said invention, referring to the accompanyingdrawings, in which Figure l is a side elevation. Fig. 2 is a plan of theunder side of the machine, showing the part beneath the table-top; Figs.3 and 4, parts of the feed motion detached. Figs. 5, 6, 7, and 8-areillustrations of the looper.

My improvements are made upon the single-threaded or tamboursewing-machine, to which alone they relate, the construction andarrangement of the parts being devised with special reference tocheapness and durability, combined with accuracy and certainty ofoperation and ease of adjustment, such as no other machine with which Iam acquainted possesses.

The construction is as follows: On a suitable table, 00, of any figure,I hinge two arms, A and B, with their fulcrums y below the top of thetable 00. The arm Ais for the purpose of holding down the cloth ormaterial to be sewed. It is kept down by a spring, a. Its The arm B hasthe needle I), attached, as usual, to its forward end. This arm Breceives its motion from a wrist or crank pin, a, on the driving-shaft cby means of connecting -rod d, jointed to the lower end of the arm B,and uniting it with the crank-pin c, the revolution of which vibratesthe arm B and needle up and down. When the needle is threadedit carriesa loop of thread down below the un der side of the table-top x andopposite the point of a finger, e, of a curved figure, as clearly seenat Fig. 8 detached. Then, as the needle recedes, the loop bows outward,guided by the guard-piece f, and is then readily and surely caught bythe point of finger e, and is thus retained until the needle is withdrawn. The finger e is affixed to a bent arm, 9, clearly represented inFigs. 1, 2, 5, 6, ,7. It lies along the upper side of said arm g at justsufficient distance therefrom to permit the largest-sized thread to passbetween the finger and arms. (This is best seen in Figs.

loosely. The face of the arm g opposite the finger being roughened, itcatches the thread on its roughened surface and causes the loop toincline over, and the position of the fulcrum (hereinafter described)aiding, the loop is thrown out so as to cause the needle to pass throughit with certainty and without springs or compound motion of any kind.The position of the fulcrum or center of motion of arm 5/ throwsthefinger backward, as will be clearly seen by an examination of Fig. 5, soas to insure the tapping of the loop by the needle. Motion is given tothe looper by the same crank-pin, c, as moves the arm B. This may beeffected by attaching it to the same pin as connects the arm B with theconnecting rod d, as seen in the drawings, by means of the connecting-rod h,- or this connecting-rod h may be jointed to the same crank-pinor to any part of rod d.

The feed is effected by means of a lever, i, having its fulcrum at It.On the front end of this lever there is a projection, i, (seen in Fig.3,) which works in a slot through the table. The other end of lever iisbent into an inclined plane, as at i". A small arm, i may also extendfrom a; outon. one side to steady it. It will be noticed that the arm 2'of lever i inclines two ways relatively to the line of motion of arm 13,011 which, opposite the lower end of the arm 4?, there is a setscrew, w,which strikes against the inclined arm 2' and lifts up the endprojection, i,

through the plate 00, so as to come in contact with the cloth and bringarm i up against the.

bottom of the table, and then, by still bearing against the arm 1' aside motion is given by the side incline of arm 6 to projection c",which feeds the material being sewed. A small spring, m, (see Fig. 8,)retracts the projection 2" below the surface of the plate, as seen inthat figure, and the spring 12 draws back the lever t to its place.

Having thus fully described my improved single-threaded machine, what Iclaim there in as new is Forming a narrow space between the looperfingerc and arm g, in combination with the rough surface on g, the whole beingconstructed and arranged substantially as herein set forth.

ALB. H. HOOK. In presence of- J. O. SEYMOUR, WM. T. LATIMER.

